["6 different sizes: Wood Drill Bit Set Applicable model: only for square hole machine. Wood drill bits 6 pieces per pack with different slot diameters to meet your needs. Size: 1/4 inch (6.35 mm), 5/16 inch (8 mm), 3/8 inch (9.5 mm), 1/2 inch (12.7 mm), 9/16 inch (14 mm), 5/8 inch (16 mm)."Square Drill Wood Function: Square wood drill bit has a double effect when used with a chisel machine and a hammer drill, the square perforation requires an electric drill, a hammer, and other tools. The square drills into the hole drilled by the rotating body, while the impact of the hammer's striking force on the outer body."Square Slot Drill Material Made of Steel: This square drill bit is made of special steel, heat treated, HRC48-50, Otoplee Square Hole Drill Bit Set for Woodworking provides high hardness, an extended core, and high concentricity."Square Wood Chisel Wide Application: The professional square drill bit is suitable for construction sites, installation, renovation, decoration, etc. An excellent accessory for chisels, shears, and woodworking."Tips: Wood Chisel For Router The drill chisel alone will not work in a chuck for your drill, you need to press in a mortise lock. Ideal for drilling square holes in wood with a mortising machine or mortising attachment Square hole drills are mainly used for woodworking."]
